Incinerator stoker winged grate

ABSTRACT

A pivoted grate for an incinerator stoker having a high point at the rear of its top surface, the high point being located at the median line of the incinerator stoker. The top surface of the grate is sloped down forwardly and laterally from said high point. With an even number of pivoted grates in each row, the two pivoted grates in the center of each row are winged grates, each having the high point at the inner rear corner of the top. Where an uneven number of pivoted grates is located in each row, only the center grate of each row is a winged grate, the high point being at the center of the rear edge of the top.

United States Patent Inventors Donald J. Sprague Massillon; Joseph F. Stenglein, Centerville; Glenn T. Dubs, Canton, Ohio Appl. No. 849,349 Filed Aug. 12, 1969 Patented Mar. 2, 1971 Assignee Canton Stoker Corporation Canton, Ohio INCINERATOR STOKER WINGED GRATE [56] References Cited UNITED STATES PATENTS 968,735 8/1910 Boies et a1. 1 10/39 2,160,800 5/1939 Goerg 126/176X Primary Examiner-Edward G. Favors Attorney-Frease & Bishop ABSTRACT: A pivoted grate for an incinerator stoker having a high point at the rear of its top surface, the high point being located at the median line of the incinerator stoker. The top surface of the grate is sloped down forwardly and laterally from said high point.

6 Claims 4 Drawing Figs With an even number of pivoted grates in each row, the two U.S.Cl 110/39, pivoted grates in the center of each row are winged grates, 126/176 each having the high point at the inner rear corner of the top. Int. Cl F23b 1/22 Where an uneven number of pivoted grates is located in each Field of Search 110/39, 38, row, only the center grate of each row is a winged grate, the

Y 33; 126/176 high point being at the center of the rear edge of the top.

I 2 7 /IO 1 lb 7 2 9 A. w w

INCINIERATOR STOKER WWGED (IRATE CROSS REFERENCE TO RELATED APPLICATIONS This application is concerned with pivoted grates for use in BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to incinerator stokers in which successive rows of rocking grates are joumaled upon structural members. Means is provided for rocking alternate rows of grates to intermittently feed refuse and garbage forwardly upon the grates from the area of the charging chute to the discharge end of the stoker incinerator.

2. Description of the Prior Art In such incinerator stokers, the refuse and garbage is dropped from above onto the central portion of the grate surface at the cold end of the incinerator stoker and has a tendency to remain piled up upon the central portion of the grate surface as it is fed forwardly thereon. We know of no incinerator stoker having means for giving the refuse and garbage laterally away from the center so as to distribute it evenly over the grate surface.

SUMMARY OF THE INVENTION In general terms the invention may be briefly described as comprising an incinerator stoker having winged grates in the longitudinal center portion of the cold feeding zone. Each winged grate has atop surface having a high point at the rear edge thereof, the high point being located at the longitudinal median line of the incinerator stoker and the top surface of the grate being sloped forwardly and laterally from said high point.

In incinerator stokers where an even number of pivoted grates is located in each row, the two pivoted grates in the center of each row are winged grates. Each of such winged grates has the high point of its top surface at the inner rear corner of the top and the top surface is sloped forwardly and laterally outward therefrom.

In cases where an uneven number of pivoted grates is located in each row, a center grate only of each row is a winged grate. In such cases, the high point is at the center of the rear edge of the top of the grate and the top surface slopes forwardly from said high point and laterally toward both ends of the grate.

These winged grates may be located throughout the cold feeding zone of the incinerator stoker and may, if necessary, extend into the heat zone in order to feed the refuse and garbage laterally in both directions from the center of the incinerator stoker and spread it uniformly over the entire grate surface.

A primary object of the invention is to provide winged grates in an incinerator stoker for feeding refuse and garbage outwardly in both directions fromthe center of the incinerator stoker and distributing the same uniformly over the entire grate surface.

Another object of the invention is to provide such a winged grate having a high point at the rear edge of its top surface located at the longitudinal median line of the incinerator stoker, the top surface of the winged grate sloping forward and laterally outward from said high point.

A further object of the invention is to provide a winged grate of the character referred to in which the high point is at the inner rear corner of the winged grate, the top surface thereof sloping forwardly and laterally from the high point.

A still further object of the invention is to provide such a winged grate in which the high point is at the lateral center of the rear edge, the top surface of the winged grate sloping forwardly and laterally from the high point toward opposite ends of the winged grate.

Another object of the invention is to provide an incinerator stoker of this type in which the grate bed includes successive rows of pivoting grates, the center grates in each row of pivoted grates being winged grates, while the remaining grates in each row have I flat top surfaces.

These and other objects, apparent from the drawing and following description, may be attained, the above-described difficulties overcome and the advantages and results obtained, by the apparatus, construction, arrangement and combinations, subcombinations and parts which comprise the present invention, preferred embodiments of which, illustrative of the best mode in which applicants have contemplated applying the principles, being set forth in detail in the following description and illustrated in the accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a diagrammatic top plan view of a portion of a grate bed for an incinerator stoker constructed in accordance with the invention, showing four grates in each row of pivoted grates; the two centergrates in each row being winged grates;

FIG. 2 is an enlarged sectional view taken as on the line 22, FIG. 1; 1 l

FIG. 3 is an enlarged detached perspective view of a singlewinged grate such as shown in FIG. 2; and

FIG. 4 is a section similar to FIG. 2 showing a single winged grate in each row of pivoted grates.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention relates to large incinerator stokers for industrial and municipal use for burning garbage and refuse. Incinerator stokers of this general type have a continuous grate bed having alternate rows of pivotally mounted grates with means for rocking the alternate rows of pivoted grates to feed the refuse and garbage forward from the cold zone where it is charged onto the grates through a hot zone and then a cooling zone.

Refuse and garbage is dropped form above onto the center portion of the grate bed in the cold zone of the incinerator stoker and trouble is experienced in piling up of the garbage and refuse along the center of the grate bed as it is fed forwardly thereon by rocking movement of the pivoted grates.

In the present invention, in order to overcome this objection and distribute the refuse and garbage more uniformly over the grate bed, winged grates are provided at the median longitudinal center of the incinerator stoker at least in the cold zone.

The winged grates have high points at the rear edges located at or near the longitudinal median line of the incinerator stoker, the top surface of each winged grate sloping forwardly and laterally outward from the longitudinal center of the incinerator stoker.

Each pivoted grate is indicated generally at l. Each pivoted winged grate is indicated generally at la in FIGS. 1, 2 and 3; As best shown in FIG. 3, each grate has a top surface 2 and an arcuate surface 3. Each grate is provided at one side with ears 4 to which reciprocating bars 5 may be pivotally attached, as indicated at 6, for rocking the grates upon their pivots, as indicated at 7.

Bearing blocks, which may be in the form of pillow blocks h, are supported at the ends of the pivoted grates upon structural members such as I-beams 9 which may be forwardly and downwardly inclined from the cold zone to the discharge end of the incinerator stoker, as in usual practice.

The grate and trunnion assembly may be such as illustrated and described in detail in our copending application above referred to.

The top surface 2 of each pivoted grate is ordinarily flat as indicated on the outer grates I in FIGS. 2 and 4. Referring now more particularly to the winged grates la in FIGS. 2 and 3, the top surface of each of the winged grates has a highpoint 10 at its rear edge adjacent the longitudinal center of the incinerator stoker, the top surface then sloping downwardly and forwardly as indicated at 11 and downwardly and laterally outward as indicated at 12 away from the longitudinal center of the incinerator stoker.

As a shown in FIGS. 1 and 2, where there four, or any other even number of pivoted grates in a row, two winged grates la are located at the center of each row with the high point toward the center of the incinerator stoker.

Referring now more particularly to FIG. 1, the section of the incinerator stoker at the cold or charging end is indicated diagrammatically. Rows of stationary grates 13 are located between the rows of pivoted grates 11a, being attached to the flanges of the I-beams 9, as illustrated and described in our copending application above referred to.

Filler blocks 14 are located at the ends of the pivoted grates I and la between the pillow blocks 8 and stationary grates 13. A spill-over grate 15 may be located at the end of a section of the incinerator stoker, and side fillers 16 may be mounted on the flanges of the l-beams 9 so that a continuous surface is provided from one sidewall of the incinerator to the other.

In FIG. I the outline of the overhead chute through which the refuse and garbage is dumped upon the cold section of the grate bed is indicated in broken lines at 17. Ordinarily, as above mentioned, this refuse and garbage has a tendency to pile up along the longitudinal center of the grate bed.

With the winged grates 1a in the center of each row of pivoted grates, as the grates are tilted forward and back, the top surfaces of the winged grates 1a sloping laterally outward from the inner end of each winged grate will tend to move some of the refuse and garbage outwardly as well as forwardly, so as to more evenly distribute it over the grate bed.

In FIG. 4 is shown an embodiment of the invention in which there is an uneven number of pivoted grates in each row. In this embodiment of the invention, only a single-winged grate is provided at the center of each row of pivoted grates and the same is indicated generally at 1b. This winged grate differs from the winged grates 1a in that the high point 10' is located at the center of the rear edge of the top surface and the top surface is inclined downwardly and outwardly toward each end from the center, as indicated at 12'. All other parts are the same and the same reference numerals are used thereon as in FIGS. 1, 2 and 3.

We claim:

I. An incinerator stoker including a plurality of rows of pivoted grates, each pivoted grate having a top surface and an arcuate surface, the central grates in the rows being winged grates, each winged grate having a high point at the rear edge of its top surface, said high point being located at the longitudinal center of the incinerator stoker, the top surface of each winged grate sloping down forwardly and laterally from said high point.

2. An incinerator stoker as defined in claim 1 in which there are an even number of pivoted grates in each row, the two center grates in each row being winged grates, the high point being located at the inner end of the rear edge of each winged grate.

3. An incinerator stoker as defined in claim 1 in which there are an uneven number of pivoted grates in each row, the center grate in each row being a winged grate, the high point being located at the center of the rear edge of each winged grate.

4. A pivoted grate for an incinerator stoker, said pivoted grate having a top surface and an arcuate surface, there being a high point at the rear edge of the top surface, the top surface sloping down forwardly and laterally from a said high point.

5. A pivoted grate as defined in claim 4 in which the high point is at one end f of the rear edge of the top surface.

6. A pivoted grate as defined in claim 4 in which the high point is at the center of the rear edge of the top surface. 

1. An incinerator stoker including a plurality of rows of pivoted grates, each pivoted grate having a top surface and an arcuate surface, the central grates in the rows being winged grates, each winged grate having a high point at the rear edge of its top surface, said high point being located at the longitudinal center of the incinerator stoker, the top surface of each winged grate sloping down forwardly and laterally from said high point.
 2. An incinerator stoker as defined in claim 1 in which there are an even number of pivoted grates in each row, the two center grates in each row being winged grates, the high point being located at the inner end of the rear edge of each winged grate.
 3. An incinerator stoker as defined in claim 1 in which there are an uneven number of pivoted grates in each row, the center grate in each row being a winged grate, the high point being located at the center of the rear edge of each winged grate.
 4. A pivoted grate for an incinerator stoker, said pivoted grate having a top surface and an arcuate surface, there being a high point at the rear edge of the top surface, the top surface sloping down forwardly and laterally from a said high point.
 5. A pivoted grate as defined in claim 4 in which the high point is at one end f of the rear edge of the top surface.
 6. A pivoted grate as defined in claim 4 in which the high point is at the center of the rear edge of the top surface. 